Process of producing boron carbonitrid.



S. PEAGOOK. PROCESS OF PRODUCING BORON OARBONITRID.

' APPLICATION FILED SEPT. 7, 1912.

1,129,508. Patented Feb. 23, 1915.

SAMUEL rEAoocK, or cnroaoo, ILLINOIS, ASSIGNOR T0 INTERNATIONAL aemonn-TURAL CORPORATION,

OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PROCESS OF PRODUOING BORON CARIBO'NITRID.

To all whom it may concern Be it known that I, SAMUEL PEAoooK, 'acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois,'have invented certain new and useful Improvementsin Processes of Producing Boron Carbonitrid; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the 'art to which it appertains tomake and use the same.

*This-invention relates toa process of producing boron carbo-nitridfrom'boron oxid and gaseous nitrogen, and has for its object thefixation of atmospheric nitrogen in a manner less expensive than themethods heretofore proposed.

lVith this and'other objects in view the invention consists in the novelsteps constituting my process more fully hereinafter disclosed and partcularly pointed out in the claims. a,

Referring to the accompanying drawings forming a part of thisspecification in which 'nace' suitable for carrying out my process,

1 indicates any suitable furnace walls but preferably of refractorymaterial having a carborundum lining 2, and a metal casing 3.

4 indicates a water jacket surrounding a lower extension of the casing3, and located within the chamber 5 of he base brick work 6. I

7 represents inlet and exit pipes for the water supplied to the waterjacket; 8, 9 and 10 represent electrodes. for passing a suitable currentthrough the charge 11; 12 suitable gas tight pipes for feeding thecharge to thefurnace; 13 aninlet pipe for the gaseous nitrogen orproducer gas that is fed to the furnace; and 1 1 a suitable connectionwith a manometer for indicating the pressure of gas inside the furnace.

chargev of finely and introduce the briquets pipes 12. Unless theSpecification of Letters Patent.-

high temperature and enriched and can also proportioned, preferably"Patented Feb. 2a, 1915. Application filed September 7, 1912. Serial No.719,155.

charge is briqueted considerable difficulty is liable to be experiencedin maintaining an lessen the volatilization of the compounds formed. I

After the carbo-nitrid is formed in the zone between the elecdown bygravity out of trodes, it passes of the furnace,

said zone to the lower part where it is gradually cooled by jacket 4: inan atmosphere of nitrogen, or producer gas, as the case may be, Fromthis latter position it is continuously removed from the furnace by theconveyer 15, and since the material is constantly fed in at the top, theprocess is a continuous one.

course, any other suitable typeoffurnace than the one illustrated may beemployed.

the water (3., whereupon Either nitrogen gas or producer gas may beemployed as above stated, but I prefer producer gas on account of itscheapness. Such gas contains on the average about 60% nitrogen, N and40% carbon monoxid, CO, and when the nitrogen is removed by my processthe producer gas is greatly improved be utilized for combustion or otherpurposes. That is to say, from the carbo-nitrid equation, it is evidentthat for each volume of nitrogen fixed, an equal volume of carbonmonoxid, CO, is liberated, and joins the furabove,

I after determining from nitrid,which consists in nace gases. Now whenproducer gas is emloyed, having say of nitrogen and 0% of carbonmonoxid, and if one third or 20% of the nitrogen is fixed, it is evidentthat 20% of carbon monoxid will still be added to the l0% of carbonmonoxid already present. Accordingly the resulting mixture will contain60% of carbon monoxid instead ofits original 40%. It follows, therefore,that the producer gas by my process is not only purified of its nitrogenbut is is also enriched by a substantial addition of carbon monoxid,causing it to become a valuable byproduct.

Incarrying out the process in order to avoid a serious retardation ofthe reaction it is desirable to maintain such a flow of nitrogen throughthe furnace that the partial. pressure of the carbon monoxid gas presentWill not exceed say 480 to 500 millimeters ofmercury. This can bereadilyaccomplished time to time the percentage of carbon monoxid present, andtaking note of the gaseous pressure in the furnace. The boroncar'bo-nitrid thus produced may be used for a variety of purposes, but Iprefer to treat it with superheated steam at substantially 180 (3., whenthe following reaction takes plaoe:-

- Ammonia will be produced by treating the carbo-nitrid with water atless temperatures, but the reaction velocity in such cases will bereduced as the temperaturelowers.

-The carbon-m0noxid or other furnace gas may be drawn from the furnaceby any suit-v able means, as for example through the pipe 20. x 1

/'It is obvious that those skilled in the art may vary the details of myprocess without departing from the spirit the above disclosure except asmay be re-v quired by the claims.

What I claim is 1. The process of producing boron carbo nitrid, B,N,.C Nwhich consists in preparing a mixture of boron oxid and carbon; andsubjecting the samein an atmosphere containing nitrogen butsubstantially devoid of free oxygen to a temperature suflicIent toproduce said carbo-nitrid; substantially as described.

- 2. The process of producing boron carbopreparing a mixture of boronoxid and carbon; forming the same into briquets; and subjecting thebriquets of my invention, and therefore I do not wish to be limited tonitrid, which consists 1n preparing a mixin an atmosphere containingfree nitrogen to a temperature suflicient to produce said carbo-nitrid,substantially as described.

3. The process of producing boron carbonitrid, which consists inpreparing a mixture of boron oxid and carbon; forming the same intobriquets; and subjecting the briquets in an atmosphere devoid of freeoxygen but containing free nitrogen to a temperature suflicient toproduce said. carbonitrid; substantially as described.

4. The process of producing boron carbonitrid, which consists inpreparing a mixture of boronoxid and carbon; subjecting the same in anatmosphere containing nitrogen but substantially devoid of free oxygento a temperature sufficient to produce said carbo-nitrid; and coolingsaid carbonitrid in an inert atmosphere; substantially as described.

5. The process of producing boron carbonitrid,which consists inpreparingamixture of boron oxid and carbon; forming thesame intobriquets; sub ectmg the brlquets 1n an atmosphere containing freenitrogen to temperature suflicient to produce said carbonitrid; andcooling said carbo-mtrid in an atmosphere containing free nitrogen; substantially as described.

6. The process of producing boron carbonitrid, which consistsinpreparing a mixture of boron oxid and carbon; and subjecting the same inan atmosphere of producer gas to a temperature suflicient to producesaid carbo-nitrid; substantially as described. v

7. The process of producing boron carbonitrid, which consists inpreparing a mixture'of boron oxid and carbon; subjecting the same in anatmosphere of producer gas to a temperature sufiicient to produce sa dcarbo-nitrid; and gradually cooling said .carbo-nitrid in an atmosphereinert to said c'arbo-nitrid; substantially as described.

' 8. The process of producting boron carboture of boron oxid and carbon;and subjecting the'same in an atmosphere containing free, nitrogen to atemperature sufficient to produce said carbo-nitrid thereby causingcarbon-monoxid to be evolved While maintaining the partial pressureofthe carbonmonoxid present below 500 millimeters of mercury;substantially as described.

In testimony whereof, I aflix my signature, in presence of twoWitnesses.

SAMUEL PEACOCK. Witnesses:

N. CURTIS LAMMOND, T. A. WITHERSPOON.

